1 files changed, 98 insertions, 0 deletions
diff --git a/setup_native/source/win32/customactions/tools/checkversion.cxx b/setup_native/source/win32/customactions/tools/checkversion.cxx
new file mode 100644
index 000000000..3f0b30f3c
--- /dev/null
+++ b/setup_native/source/win32/customactions/tools/checkversion.cxx
@@ -0,0 +1,98 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <msiquery.h>
+
+#include <cassert>
+#include <string.h>
+#include <malloc.h>
+#include <stdio.h>
+#include <strsafe.h>
+
+#include "seterror.hxx"
+
+
+static bool GetMsiPropW( MSIHANDLE hMSI, const wchar_t* pPropName, wchar_t** ppValue )
+{
+    DWORD sz = 0;
+    if ( MsiGetPropertyW( hMSI, pPropName, const_cast<wchar_t *>(L""), &sz ) == ERROR_MORE_DATA )
+    {
+        sz++;
+        DWORD nbytes = sz * sizeof( wchar_t );
+        wchar_t* buff = static_cast<wchar_t*>( malloc( nbytes ) );
+        assert(buff); // Don't handle OOM conditions
+        ZeroMemory( buff, nbytes );
+        MsiGetPropertyW( hMSI, pPropName, buff, &sz );
+        *ppValue = buff;
+
+        return true;
+    }
+
+    return false;
+}
+
+
+#ifdef DEBUG
+inline void OutputDebugStringFormatW( PCWSTR pFormat, ... )
+{
+    WCHAR    buffer[1024];
+    va_list  args;
+
+    va_start( args, pFormat );
+    StringCchVPrintfW( buffer, sizeof(buffer)/sizeof(buffer[0]), pFormat, args );
+    OutputDebugStringW( buffer );
+    va_end(args);
+}
+#else
+static void OutputDebugStringFormatW( PCWSTR, ... )
+{
+}
+#endif
+
+
+extern "C" __declspec(dllexport) UINT __stdcall CheckVersions( MSIHANDLE hMSI )
+{
+    // MessageBoxW(NULL, L"CheckVersions", L"Information", MB_OK | MB_ICONINFORMATION);
+
+    wchar_t* pVal = nullptr;
+
+    if ( GetMsiPropW( hMSI, L"NEWPRODUCTS", &pVal ) && pVal )
+    {
+        OutputDebugStringFormatW( L"DEBUG: NEWPRODUCTS found [%s]", pVal );
+        if ( *pVal != 0 )
+            SetMsiErrorCode( MSI_ERROR_NEW_VERSION_FOUND );
+        free( pVal );
+    }
+    pVal = nullptr;
+    if ( GetMsiPropW( hMSI, L"OLDPRODUCTS", &pVal ) && pVal )
+    {
+        OutputDebugStringFormatW( L"DEBUG: OLDPRODUCTS found [%s]", pVal );
+        if ( *pVal != 0 )
+            SetMsiErrorCode( MSI_ERROR_OLD_VERSION_FOUND );
+        free( pVal );
+    }
+    pVal = nullptr;
+
+    return ERROR_SUCCESS;
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */